Toshiba N300: Retail and Bulk Part Numbers, 8 or 12 Bays, and the Enterprise Option

Toshiba N300 prices on Amazon.co.uk

Listings titled Toshiba N300 on Amazon.co.uk, with N300 PRO titles left out, ordered from the cheapest terabyte up in pounds inc VAT. The table shows 16 listings right now. Cheapest terabyte: £36.64/TB. Smallest outlay: £225.99. The N300 Pro has its own page, Toshiba N300 Pro.

A title is the seller's description; the part number decides which drive it is. A listing titled N300 can still carry an N300 Pro number, so check every row against the table in the next section and against the N300 Pro page. Toshiba's N300 sheet states CMR on every capacity page. The Recording column fills only where a document names the row's own part number, so an empty cell here means unmatched, not SMR.

Toshiba N300 4TB to 16TB and beyond: retail and bulk part numbers

Toshiba gives most N300 capacities two part numbers, a retail number and a bulk number, and a listing can print either. These are the capacity pages on Toshiba Europe's N300 sheet:

Two patterns help. Every retail number starts HDWG and ends EZST plus a letter; the Toshiba N300 4TB is the one ending C. The bulk numbers split in two: from 4 to 10 TB they are MN10ADA numbers, which look nothing like the retail ones, and from 12 to 22 TB on the 06/2025 sheet they end UZSVA. From 16 TB up the sheet gives no retail number at all, so a Toshiba N300 16TB listing that matches the sheet prints HDWG51GUZSVA.

A listing can carry a number that is on neither revision of the sheet, such as an HDWG21 or HDWG31G number or a distributor's code. We have not found a Toshiba document that lists those, so the figures on this page do not apply to them. Ask the seller which Toshiba sheet the drive belongs to before you rely on a rating.

Toshiba N300 4TB, 6TB, 8TB and 10TB against 12TB and up

Every N300 capacity page lists CMR, 7,200 RPM, up to 8 drive bays, 180 TB a year and a 3-year limited warranty. Two rated rows step at 12 TB:

That makes the step from 10 TB to 12 TB the biggest change in the range. On Toshiba's own figures the Toshiba N300 12TB idles 14 dB quieter than the 10 TB and carries 200,000 hours more MTTF, with the same spindle speed, workload and warranty. For a NAS that sits where people work or sleep, the 4 to 10 TB models are the loud ones in this family.

Toshiba N300 22TB: two sheet revisions, two answers

The two Toshiba Europe sheets disagree about the 22 TB drive. The 06/2025 copy lists bulk number HDWG62CUZSVA, no retail number, up to 8 drive bays and 1,200,000 hours MTTF. The 2026-04 revision lists the 22 TB as bulk number MN11ACA22TS and states up to 12 bays.

For a 9 to 12 bay system, the 12-bay rating belongs to MN11ACA22TS on the newer sheet, so that is the number to look for. Every other N300 capacity page on the 06/2025 sheet says up to 8, and we have not found a Toshiba document that extends 12 bays to another N300 capacity.

Toshiba N300 12TB against a 12TB enterprise drive

Toshiba's own 12 TB enterprise drive is the MG09: its overview lists MG09ACA12T among the SATA models and rates the series at 550 TB a year, against the N300's 180. Above 12 TB, Toshiba rates MG10 and MG11 at 550 TB a year too, and gives MG11 2,500,000 hours MTTF/MTBF at 0.35% AFR.

Seagate gives Exos X24 a 5-year limited warranty and 2.5 million hours MTBF, and WD gives the Ultrastar DC HC580 a 5-year limited warranty. On noise, Toshiba prints 20 dB idle for MG11 and labels the row sound power, with 32 dB at seek; the N300's 12 to 22 TB pages print 20 dB typical idle. Both are Toshiba's own dB figures, and we do not set them against the dBA figures other makers print.

The table below holds new SATA drives from the Exos, Ultrastar and Toshiba MG lines at exactly 12 TB, the size of HDWG51CEZSTA. A row's rating belongs to its own maker's sheet, so read the part number before applying any figure above. It holds 4 listings right now. Cheapest terabyte in it: £26.26/TB.

If your NAS has eight bays or fewer and writes well under 180 TB a year, the N300 sits inside Toshiba's rating and an enterprise drive buys headroom you may not use. If the yearly workload is higher, or you want five years of maker's warranty, set the enterprise rows against the N300 rows per TB. The Toshiba MG series page covers Toshiba's enterprise lines, and the 12TB enterprise hard drive page compares every maker at this size.

Sizing an N300 array

Toshiba specifies the N300 for up to 8 bays, or up to 12 for MN11ACA22TS on the 2026-04 revision. Inside that limit, the RAID level decides how much of the raw capacity you can use and how many drives can fail. The calculator shows both for your bay count.